
.panel-default .panel-heading{
    display: flex;
    flex-direction: row;
    justify-content: space-between; /* 作用是把.panel-default .panel-heading标签下面的标签，元素是两端对齐排列 */
}
.panel-default > .panel-heading a {
    text-decoration: none;
}
.panel-default > .panel-heading span {
    padding: 0 5px;
}







